Schwalbe SV19A Extra Light Tube (29/28/27.5", 40mm Valve) Road Medium = Men's US9 -

Medium = Men's US9 - 11 / Women's US10+

you've just found it my friend

Other advancements include a new inner plate finish plus chrome hardened pin construction

making them ideal for very tight tyres and tubeless setups where access to the tyre bead is very tight

Schwalbe SV19A Extra Light Tube (29/28/27.5", 40mm Valve) Road Medium = Men's US9 -Schwalbe SV19A Extra Light Tubes are for gravel, cyclocross, 27. 5" and 29" MTB, and tyre widths from 1. 5" up to 2. 35". Made from 20% recycled rubber, so not only are they low in weight, they're lower in their carbon footprint. All valves are nickel plated and threaded and valve inserts are replaceable. Less likely to leak, and more reliable. Specifications Fits Tyre Sizes: 29", 28", 27. 5" (Width 1. 5" to 2. 35") Valve Type: Presta Mfr Claimed